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8#include <linux/export.h>
9#include <linux/etherdevice.h>
10#include <linux/if_arp.h>
11#include <linux/slab.h>
12#include <net/cfg80211.h>
13#include <net/cfg80211-wext.h>
14#include "wext-compat.h"
15#include "nl80211.h"
16
17int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
18 struct wireless_dev *wdev)
19{
20 struct cfg80211_cached_keys *ck = NULL;
21 const u8 *prev_bssid = NULL;
22 int err, i;
23
24 ASSERT_RDEV_LOCK(rdev);
25 ASSERT_WDEV_LOCK(wdev);
26
27 if (!netif_running(wdev->netdev))
28 return 0;
29
30 wdev->wext.connect.ie = wdev->wext.ie;
31 wdev->wext.connect.ie_len = wdev->wext.ie_len;
32
33
34 wdev->wext.connect.bg_scan_period = -1;
35
36 if (wdev->wext.keys) {
37 wdev->wext.keys->def = wdev->wext.default_key;
38 wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
39 if (wdev->wext.default_key != -1)
40 wdev->wext.connect.privacy = true;
41 }
42
43 if (!wdev->wext.connect.ssid_len)
44 return 0;
45
46 if (wdev->wext.keys) {
47 ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
48 if (!ck)
49 return -ENOMEM;
50 for (i = 0; i < 6; i++)
51 ck->params[i].key = ck->data[i];
52 }
53
54 if (wdev->wext.prev_bssid_valid)
55 prev_bssid = wdev->wext.prev_bssid;
56
57 err = __cfg80211_connect(rdev, wdev->netdev,
58 &wdev->wext.connect, ck, prev_bssid);
59 if (err)
60 kfree(ck);
61
62 return err;
63}
64
65int cfg80211_mgd_wext_siwfreq(struct net_device *dev,
66 struct iw_request_info *info,
67 struct iw_freq *wextfreq, char *extra)
68{
69 struct wireless_dev *wdev = dev->ieee80211_ptr;
70 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
71 struct ieee80211_channel *chan = NULL;
72 int err, freq;
73
74
75 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
76 return -EINVAL;
77
78 freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
79 if (freq < 0)
80 return freq;
81
82 if (freq) {
83 chan = ieee80211_get_channel(wdev->wiphy, freq);
84 if (!chan)
85 return -EINVAL;
86 if (chan->flags & IEEE80211_CHAN_DISABLED)
87 return -EINVAL;
88 }
89
90 cfg80211_lock_rdev(rdev);
91 mutex_lock(&rdev->devlist_mtx);
92 wdev_lock(wdev);
93
94 if (wdev->sme_state != CFG80211_SME_IDLE) {
95 bool event = true;
96
97 if (wdev->wext.connect.channel == chan) {
98 err = 0;
99 goto out;
100 }
101
102
103 if (wdev->wext.connect.ssid_len)
104 event = false;
105 err = __cfg80211_disconnect(rdev, dev,
106 WLAN_REASON_DEAUTH_LEAVING, event);
107 if (err)
108 goto out;
109 }
110
111
112 wdev->wext.connect.channel = chan;
113
114
115
116
117
118
119
120
121 if (chan && !wdev->wext.connect.ssid_len) {
122 struct cfg80211_chan_def chandef = {
123 .width = NL80211_CHAN_WIDTH_20_NOHT,
124 .center_freq1 = freq,
125 };
126
127 chandef.chan = ieee80211_get_channel(&rdev->wiphy, freq);
128 if (chandef.chan)
129 err = cfg80211_set_monitor_channel(rdev, &chandef);
130 else
131 err = -EINVAL;
132 goto out;
133 }
134
135 err = cfg80211_mgd_wext_connect(rdev, wdev);
136 out:
137 wdev_unlock(wdev);
138 mutex_unlock(&rdev->devlist_mtx);
139 cfg80211_unlock_rdev(rdev);
140 return err;
141}
142
143int cfg80211_mgd_wext_giwfreq(struct net_device *dev,
144 struct iw_request_info *info,
145 struct iw_freq *freq, char *extra)
146{
147 struct wireless_dev *wdev = dev->ieee80211_ptr;
148 struct ieee80211_channel *chan = NULL;
149
150
151 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
152 return -EINVAL;
153
154 wdev_lock(wdev);
155 if (wdev->current_bss)
156 chan = wdev->current_bss->pub.channel;
157 else if (wdev->wext.connect.channel)
158 chan = wdev->wext.connect.channel;
159 wdev_unlock(wdev);
160
161 if (chan) {
162 freq->m = chan->center_freq;
163 freq->e = 6;
164 return 0;
165 }
166
167
168 return -EINVAL;
169}
170
171int cfg80211_mgd_wext_siwessid(struct net_device *dev,
172 struct iw_request_info *info,
173 struct iw_point *data, char *ssid)
174{
175 struct wireless_dev *wdev = dev->ieee80211_ptr;
176 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
177 size_t len = data->length;
178 int err;
179
180
181 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
182 return -EINVAL;
183
184 if (!data->flags)
185 len = 0;
186
187
188 if (len > 0 && ssid[len - 1] == '\0')
189 len--;
190
191 cfg80211_lock_rdev(rdev);
192 mutex_lock(&rdev->devlist_mtx);
193 wdev_lock(wdev);
194
195 err = 0;
196
197 if (wdev->sme_state != CFG80211_SME_IDLE) {
198 bool event = true;
199
200 if (wdev->wext.connect.ssid && len &&
201 len == wdev->wext.connect.ssid_len &&
202 memcmp(wdev->wext.connect.ssid, ssid, len) == 0)
203 goto out;
204
205
206 if (len)
207 event = false;
208 err = __cfg80211_disconnect(rdev, dev,
209 WLAN_REASON_DEAUTH_LEAVING, event);
210 if (err)
211 goto out;
212 }
213
214 wdev->wext.prev_bssid_valid = false;
215 wdev->wext.connect.ssid = wdev->wext.ssid;
216 memcpy(wdev->wext.ssid, ssid, len);
217 wdev->wext.connect.ssid_len = len;
218
219 wdev->wext.connect.crypto.control_port = false;
220 wdev->wext.connect.crypto.control_port_ethertype =
221 cpu_to_be16(ETH_P_PAE);
222
223 err = cfg80211_mgd_wext_connect(rdev, wdev);
224 out:
225 wdev_unlock(wdev);
226 mutex_unlock(&rdev->devlist_mtx);
227 cfg80211_unlock_rdev(rdev);
228 return err;
229}
230
231int cfg80211_mgd_wext_giwessid(struct net_device *dev,
232 struct iw_request_info *info,
233 struct iw_point *data, char *ssid)
234{
235 struct wireless_dev *wdev = dev->ieee80211_ptr;
236
237
238 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
239 return -EINVAL;
240
241 data->flags = 0;
242
243 wdev_lock(wdev);
244 if (wdev->current_bss) {
245 const u8 *ie;
246
247 rcu_read_lock();
248 ie = ieee80211_bss_get_ie(&wdev->current_bss->pub,
249 WLAN_EID_SSID);
250 if (ie) {
251 data->flags = 1;
252 data->length = ie[1];
253 memcpy(ssid, ie + 2, data->length);
254 }
255 rcu_read_unlock();
256 } else if (wdev->wext.connect.ssid && wdev->wext.connect.ssid_len) {
257 data->flags = 1;
258 data->length = wdev->wext.connect.ssid_len;
259 memcpy(ssid, wdev->wext.connect.ssid, data->length);
260 }
261 wdev_unlock(wdev);
262
263 return 0;
264}
265
266int cfg80211_mgd_wext_siwap(struct net_device *dev,
267 struct iw_request_info *info,
268 struct sockaddr *ap_addr, char *extra)
269{
270 struct wireless_dev *wdev = dev->ieee80211_ptr;
271 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
272 u8 *bssid = ap_addr->sa_data;
273 int err;
274
275
276 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
277 return -EINVAL;
278
279 if (ap_addr->sa_family != ARPHRD_ETHER)
280 return -EINVAL;
281
282
283 if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
284 bssid = NULL;
285
286 cfg80211_lock_rdev(rdev);
287 mutex_lock(&rdev->devlist_mtx);
288 wdev_lock(wdev);
289
290 if (wdev->sme_state != CFG80211_SME_IDLE) {
291 err = 0;
292
293 if (!bssid && !wdev->wext.connect.bssid)
294 goto out;
295
296
297 if (wdev->wext.connect.bssid && bssid &&
298 ether_addr_equal(bssid, wdev->wext.connect.bssid))
299 goto out;
300
301 err = __cfg80211_disconnect(rdev, dev,
302 WLAN_REASON_DEAUTH_LEAVING, false);
303 if (err)
304 goto out;
305 }
306
307 if (bssid) {
308 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
309 wdev->wext.connect.bssid = wdev->wext.bssid;
310 } else
311 wdev->wext.connect.bssid = NULL;
312
313 err = cfg80211_mgd_wext_connect(rdev, wdev);
314 out:
315 wdev_unlock(wdev);
316 mutex_unlock(&rdev->devlist_mtx);
317 cfg80211_unlock_rdev(rdev);
318 return err;
319}
320
321int cfg80211_mgd_wext_giwap(struct net_device *dev,
322 struct iw_request_info *info,
323 struct sockaddr *ap_addr, char *extra)
324{
325 struct wireless_dev *wdev = dev->ieee80211_ptr;
326
327
328 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
329 return -EINVAL;
330
331 ap_addr->sa_family = ARPHRD_ETHER;
332
333 wdev_lock(wdev);
334 if (wdev->current_bss)
335 memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
336 else
337 memset(ap_addr->sa_data, 0, ETH_ALEN);
338 wdev_unlock(wdev);
339
340 return 0;
341}
342
343int cfg80211_wext_siwgenie(struct net_device *dev,
344 struct iw_request_info *info,
345 struct iw_point *data, char *extra)
346{
347 struct wireless_dev *wdev = dev->ieee80211_ptr;
348 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
349 u8 *ie = extra;
350 int ie_len = data->length, err;
351
352 if (wdev->iftype != NL80211_IFTYPE_STATION)
353 return -EOPNOTSUPP;
354
355 if (!ie_len)
356 ie = NULL;
357
358 wdev_lock(wdev);
359
360
361 err = 0;
362 if (wdev->wext.ie_len == ie_len &&
363 memcmp(wdev->wext.ie, ie, ie_len) == 0)
364 goto out;
365
366 if (ie_len) {
367 ie = kmemdup(extra, ie_len, GFP_KERNEL);
368 if (!ie) {
369 err = -ENOMEM;
370 goto out;
371 }
372 } else
373 ie = NULL;
374
375 kfree(wdev->wext.ie);
376 wdev->wext.ie = ie;
377 wdev->wext.ie_len = ie_len;
378
379 if (wdev->sme_state != CFG80211_SME_IDLE) {
380 err = __cfg80211_disconnect(rdev, dev,
381 WLAN_REASON_DEAUTH_LEAVING, false);
382 if (err)
383 goto out;
384 }
385
386
387 err = 0;
388 out:
389 wdev_unlock(wdev);
390 return err;
391}
392
393int cfg80211_wext_siwmlme(struct net_device *dev,
394 struct iw_request_info *info,
395 struct iw_point *data, char *extra)
396{
397 struct wireless_dev *wdev = dev->ieee80211_ptr;
398 struct iw_mlme *mlme = (struct iw_mlme *)extra;
399 struct cfg80211_registered_device *rdev;
400 int err;
401
402 if (!wdev)
403 return -EOPNOTSUPP;
404
405 rdev = wiphy_to_dev(wdev->wiphy);
406
407 if (wdev->iftype != NL80211_IFTYPE_STATION)
408 return -EINVAL;
409
410 if (mlme->addr.sa_family != ARPHRD_ETHER)
411 return -EINVAL;
412
413 wdev_lock(wdev);
414 switch (mlme->cmd) {
415 case IW_MLME_DEAUTH:
416 case IW_MLME_DISASSOC:
417 err = __cfg80211_disconnect(rdev, dev, mlme->reason_code,
418 true);
419 break;
420 default:
421 err = -EOPNOTSUPP;
422 break;
423 }
424 wdev_unlock(wdev);
425
426 return err;
427}
428
